A method for detecting surface water absorption of bamboo composite pressure pipe
A bamboo composite pressure tube, water absorption technology, applied in the direction of using material absorption and weighing, can solve problems such as product sales, fresh water absorption performance, research, etc., to improve accuracy and effectiveness, and improve the ability to fully contact water. Odds, effects that increase authenticity and effectiveness
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[0039] (1) Preparation of samples in water absorption testing
[0040] (1-1) The same bamboo composite pressure pipe is sampled. During the sampling process, samples can be taken at the left, right and middle parts of the pipeline. Specifically, the pipeline is divided into five equal parts, along one direction in the first equal part, Select the sample block on the third and fifth equal parts, or in order to obtain more accurate water absorption data of the pipeline, the pipeline can be intercepted directly, divided into several sections on average, and then the left and right two sections are divided into several subsections. Sampling at the end and the middle part, thereby obtaining more sample blocks; in the sampling operation, cut a sample block with a length of 100-150mm and a width of 100-150mm along the direction of the tube axis at each sampling part For detection, wherein, the sample block is preferably equal in length and width, and the effect of being square is the...
Embodiment 1
[0057] Take a bamboo composite pressure pipe used for water transportation, 12m long, and the application environment is weakly acidic soil, cut it into 3 equal parts along the axial direction, every 4m is a sub-pipe section, divide each sub-pipe section into five equal parts, Randomly cut a sample piece of 120mm*120mm on the first, third, and fifth equal parts, seal the edges around it with the resin unsaturated polyester resin used in the inner lining of the bamboo composite pressure pipe, and spread it evenly, with a thickness of About 1.3mm. After edge banding, visually inspect the coating to ensure that there are no gaps before curing. Afterwards, place the 9 sample blocks together in an environment with a relative humidity of 63% and a relative temperature of 20°C and weigh them every 24 hours. When the mass of the sample block is 0.1%, record the mass before immersion after the stabilization, immerse it in a laboratory water tank, the pH value of the water in the water...
Embodiment 2
[0062] Take a bamboo composite pressure pipe used for water transportation, 6m long, and the application environment is weakly alkaline soil, divide it into five equal parts along the axial direction, and randomly cut a piece of 100mm* on the first, third and fifth equal parts For a 100mm sample block, seal its surroundings with the non-woven fabric impregnated with epoxy resin used in the inner lining of the bamboo composite pressure pipe to ensure that it is completely covered, and then cured, with a thickness of about 1.0mm. After the edge sealing is cured, place the 3 sample blocks together in an environment with a relative humidity of 60% and a relative temperature of 18°C to weigh every 24 hours, and weigh the 3 sample blocks twice adjacent to each other. When the difference does not exceed 0.1% of the mass of the sample block, record the stabilized mass before immersion in water, immerse it in the laboratory water tank, the pH value of the water in the water tank is 8....
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